Rainbow Electronics U3745BM - Manual (Page 2)

2
U3745BM
4663A–RKE–06/03
System Block Diagram
Pin Configuration
Figure 1. Pinning SO20
Demod.
IF Amp
LNA VCO
PLL XTO
Data
interface
U3745BM
1...3
µC
Power
amp.
XTO VCO
PLL
U2745B
Antenna Antenna
UHF ASK/FSK
Remote control transmitter
UHF ASK
Remote control receiver
Encoder
M44Cx9x
1 Li cell
Keys
1
2
3
4
5
6
7
8
10
9
19
18
17
16
14
15
13
12
11
20
AVCC
AGND
DGND
MIXVCC
LNAGND
LNA_IN
ASK
CDEM
POUT
MODE
XTO
LFGND
LF
ENABLE
TEST
NC LFVCC
DATA
DVCC
NC
U3745BM